Public bug reported: On my new PC something is wrong with ACPI support under Linux. I have to boot it with acpi=off and nolapic, without any of those two system won't boot. (As a side effect it detects only one CPU core and won't shut down completely, I have to hold power button for few seconds to power PC off.)
My configuration: Ubuntu 12.04 (upgraded from 11.10) Processor AMD FX(tm)-4100 Quad-Core RAM 8,00 GB Graphic Gigabyte GV-N56GOC-1GI (NVIDIA GeForce GTX 560) Mainboard Gigabyte GA-870A-USB3 Disk ATA OCZ-AGILITY3 (SSD) According to https://wiki.ubuntu.com/DebuggingACPI I tried booting it with acpi=ht (also with acpi=ht AND nolapic), but not to avail. Quote: 'If acpi=off works and acpi=ht fails, then the issue is in the ACPI table parsing code itself, or perhaps the SMP code. ' I will also attach files mentioned on the DebuggingACPI wiki page. ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1007508 Title: ACPI bug in Precise (generic kernel 3.2.0.24.26) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1007508/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs